70logtrdNX2.doc Page 1 Latest update 13 Jan -03
7. LOG TRANSDUCER.
Principle of operation
When the impeller of the Log Transducer is rotating there are magnets in two of
the blades inducing magnetic power in a Hall element.
This Hall element signal is converted to pulses of 5 V.
The water stream will give 7 pulses/m equal to 12964 pulses per Nautic mile.
Technical specifications
Dimensions:
Through-hull fitting 42 x 86 mm (1 5/8 x 3 3/8”)
Transducer cable:
8 m (26,2 ft)
Power supply:
12 V DC (10-18 V)
Power Consumption
12 mW
Accuracy:
± 1 %
Speed range:
0,2 - 30 knots
Temperature range:
Storage: -30° to +80°C (-22° to +176°F)
Operation: -10° to +70°C (14° to 158°F)
Connections:
Green - + 12 V
Yellow - Log pulse
White - Temperature
Screen - 0 V Ground
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